I added some functionality to this jig. The idea was great, but functionally it didn't meet the tolerances of the keys. 

• I added a slot for holding wires. These are a pain when you don't have a PCB and you're prototyping something, so this holds the wires without tension so that you can do it quickly.
• I added a cutout so the switch rests on the edge of the box, rather than trying to align into the cutout
• Refer to the photo for use.